For whatever reason, this seemed (at the time) to be the funniest game ever.

*Knock, knock*.
Door opens.
Mommy shouts, "Ohno,ohno,ohno!!!!"
Baby giggles hysterically.
Lather, rinse, repeat.

Rory is 11 months old in this video. She's also intermittently playing a kazoo. She continues to develop her multitasking skills.